#include <iostream>

using namespace std;

int main() {

    int cat;

    cin >> cat;
    // -21亿 --- 21亿

    switch(cat) {
        case 9:
            cout << "小白" << endl;
            break;

        case 8:
            cout << "小黑" << endl;
            break;

        case 6:
            cout << "小棕" << endl;
            break;

        case 4:
            cout << "小灰" << endl;
            break;

        default:
            cout << "无" << endl;
            break;
    }

    return 0;
}
